Absolute silence without compromising performance is my only benchmark score.

I still think System Shock 2 is the best game ever. Followed by the original Deus Ex. Maybe not the best selling games but certainly one of the most fun, long, complex with really immersive story, characters and environments. The sort of games where you feel developers really devoted all their passion for gaming into their product.

I never played Doom, TBH, but I once played the first episode of Wolfenstein on the 300MHz AMD K-6-II based Win 98 pc during my teen years (then the game was already considered a classic, in the early 2ks).

I considered Metro 2033 too, because of the same reason, but that game is not a fair choice because it is based on a book (making the game good, story wise, is then a lot easier IMO)

Runner-ups are (in no specific order): Metro 2033, Tales of Symphonia, Minecraft, S.T.A.L.K.E.R.: Shadow of Chernobyl, Age of Empires, Empire Earth, (list may potentially be longer but I think it is enough).